There were about 2,900 fatal crashes involving combination trucks in 2020

Of those crashes, over 3,200 people died in total, including about 450 large truck occupants.

A combination truck is defined as a truck tractor pulling any number of trailers (including a “bobtail” truck tractor not pulling any trailers) or a straight truck pulling at least one trailer.
Chart: Emily Schmidt, APM Research Lab Source: Federal Motor Carrier Safety Administration Get the data